Kubernetes Manifest Generator

Generate a Deployment, Service, Ingress, ConfigMap and HorizontalPodAutoscaler for one app, with resources, probes and a restricted security context.

Free · No sign-up · Your inputs stay in your browser

Input

Generate Kubernetes manifests

NameImagePin a version or digest. :latest with the default IfNotPresent pull policy means nodes run whatever they cached.Container portReplicas

CPU requestMemory requestCPU limit (optional)Memory limit

Health check pathEmpty for no probes.

Ingress (ingress-nginx)HostTLS via cert-managerConfigMap and Secret as environmentHorizontalPodAutoscaler at 70% CPU

Output

manifests.yaml

1,836 characters

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
  labels:
    app.kubernetes.io/name: web
spec:
  replicas: 2
  selector:
    matchLabels:
      app.kubernetes.io/name: web
  template:
    metadata:
      labels:
        app.kubernetes.io/name: web
    spec:
      securityContext:
        runAsNonRoot: true
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: web
          image: ghcr.io/example/web:1.4.0
          ports:
            - name: http
              containerPort: 8080
          resources:
            requests:
              cpu: 250m
              memory: 256Mi
            limits:
              memory: 512Mi
          readinessProbe:
            httpGet:
              path: /healthz
              port: http
            periodSeconds: 5
          livenessProbe:
            httpGet:
              path: /healthz
              port: http
            initialDelaySeconds: 10
            periodSeconds: 10
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop:
                - ALL
---
apiVersion: v1
kind: Service
metadata:
  name: web
  labels:
    app.kubernetes.io/name: web
spec:
  selector:
    app.kubernetes.io/name: web
  ports:
    - name: http
      port: 80
      targetPort: http
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: web
  annotations:
    cert-manager.io/cluster-issuer: letsencrypt
spec:
  ingressClassName: nginx
  tls:
    - hosts:
        - app.example.com
      secretName: web-tls
  rules:
    - host: app.example.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: web
                port:
                  name: http

Apply with kubectl apply -f manifests.yaml. Memory limit equals or exceeds the request because a pod over its memory limit is OOM-killed; a CPU limit is left off by default because it throttles rather than protects. readOnlyRootFilesystem is on: mount an emptyDir for any path the app writes to.

Runs in this browser. Nothing you paste is sent to a server.

About this tool

Method, assumptions, practical next steps, and limits.

Requests and limits

The scheduler places pods by their requests, so requests should match normal usage. A container above its memory limit is OOM-killed (exit code 137), so the limit should cover peaks. CPU limits throttle rather than kill, and many teams leave them off to avoid latency spikes; the resource management docs describe both.

Probes

The readiness probe decides whether a pod receives traffic; the liveness probe whether it is restarted. Point readiness at a check of the app's dependencies, and liveness at something cheap that only fails when the process is truly stuck, or a slow database restarts every pod at once.

Frequently asked questions

Why is my pod in CrashLoopBackOff?

The container keeps exiting. kubectl logs pod-name --previous shows the output of the last crash, and kubectl describe pod shows the exit code and events.

Do I need an Ingress?

Only to expose HTTP services through one load balancer by host or path. Internal services talk to each other through their Service names.

Is what I paste sent anywhere?

No. The tool runs entirely in your browser with JavaScript. Nothing you type or paste is sent to our server or stored.

Kubernetes Manifest Generator

Generate Kubernetes manifests

manifests.yaml

Requests and limits

Probes

Frequently asked questions

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